On Tue, 11 Dec 2012 05:31:05 -0500, "Eisboch" wrote:

The seas weren't breaking and
were nothing even close to those in your video, but they were fast
moving and big enough to lift the stern so high that the rudders
became useless. Each time one caught up and passed under the boat it
deposited it in a heading that was probably 20 - 30 degrees off my
intended course.

===

Yes, once your boat starts skidding sideways down the front of a wave
you begin to appreciate how much energy is involved, and how quickly
things could go wrong.